docs: fix missing refs warnings

EXTRACT_STATIC
flag 2 private methods

doc/CMakeLists.txt

@@ -8,6 +8,7 @@ option(BUILD_DEV_DOCS "Build and install developer documentation" OFF)
 if (DOXYGEN_FOUND)
   # Generic Doxygen options
   set(DOXYGEN_EXTRACT_ALL YES)
+  set(DOXYGEN_EXTRACT_STATIC YES)
   set(DOXYGEN_STRIP_FROM_PATH ${CMAKE_SOURCE_DIR})
   set(DOXYGEN_QUIET YES)
   set(DOXYGEN_PROJECT_NAME ${CMAKE_PROJECT_PROPER_NAME})

doc/dev/protocol_reference.md

@@ -228,7 +228,7 @@ When encryption is enabled, the protocol follows this sequence:
 3. Protocol handshake begins only after TLS session is established
 
 - **Implementation Details**:
-    - The client initiates a standard TCP connection, then the @ref SecureSocket::handleTCPConnected method is called, which begins the TLS handshake
+    - The client initiates a standard TCP connection, then the (private) SecureSocket::handleTCPConnected method is called, which begins the TLS handshake
 
 - **Certificate Validation**:
     - Client implementations **must** validate the server's certificate
@@ -260,7 +260,7 @@ A modifier (modifier mask) represents the state of modifier keys (like Shift, Co
 - Upon receiving a kMsgCKeepAlive message, the client must immediately send a kMsgCKeepAlive message back
 - The client maintains a timeout that is reset each time any message is received
 - If no message is received for 9.0 seconds (3 × @ref kKeepAliveRate), client must disconnect
-- This is handled by the @ref ServerProxy::handleKeepAliveAlarm method
+- This is handled by the  (private) ServerProxy::handleKeepAliveAlarm method
 
 <a id="constraint-screen-entry-sync"></a>
 ### Synchronization on Screen Entry